Hoisting device.



M. KIMBLE.

HOISTING DEVIGIL. APPLICATION IIVLED APR. 22. 1908.

Patented Apr. 6, 1909.

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UNIT TATE PATENT @FFTQE MARTIN KIMBLE, OF HIGHWOOD, ILLINOIS.

HOISTING DEVICE.

To all whom it may concern:

Be it known that I, MARTIN Kn-JBLE, a

citizen of the United States, residing at,

Highwood, in the county of Lake and State of Illinois, have inventedcertain new and useful Improvements in Hoisting Devices, of which thefollowing is a specification.

This invention is a hoisting device particularly adapted for pullingposts, stun JS and the like, but useful as jack for lifting purposesgenerally.

The object of the invention is to provide an improved device of the kindcharacterized particularly by automatically ac g catches which engagethe hoisting bar the same is being operated.

The invention is illustrated in the accompanying drawings, in which--Figure 1 is a side elevation. similar view at right angles to Fig.

Referring specifically to the drawings, 1 indicates a hollow headthrough which the lifting bar 2 is slidable. This bar is rated along oneedge, as indicated 10. At the lower end it has a hook S to hold thechain 6 or other device used to grip the post or other article to belifted. The head is hung the top by means of an eye bolt 7 dependingfrom a cross piece at the top of legs 7 which may be strengthened bycross brace 11 at the bottom. The head is conveniently formed by foldinga piece of heavy sheet metal forming opposite cheeks, and these cheeksare provided. with openings 12 in which the dogs 3 and 4 work. The dogsconsist of loops which extend around the lifting bar, and each of themhas an edge 13 which will engage in the serrations of the bar when theloops are inclined at an angle to the axis of the bar. The side edges ofthe loops project into the openings 12 in the Specification of LettersPatent.

Application filed. April 22, 1908.

Patented April 6, 1909.

Serial No. 428,541.

cheeks, and the lower edge of the upper open ing is inclined as at 12The upper dog 3 acts as catch to prevent back slip, and the lower dog 4receives the pressure of the lifting lever 5 which is fulcrumed at 15between the cheeks of the head and the too 16 of which engages under thedog 4 as shown.

In operation, when the lever is swung d wn it tilts the dog l, causingits edge 13 to engage in one of the serrations of the bar, and oncontinued pressure the bar is lifted, sliding freely through the dog 3.When the lever is raised or eased off, the upper dog 3 drops against theinclined edges 12 of the. 5

openings in each cheek, and is thereby tilted so that its edge 13engages in the serrations in the bar and holds the bar against hack kMeanwhile the dog 4 drops down for a fresh hold, and so the bar islifted by successive operations of the lever and the load is hoisted.The device will be found particularly useful as portable implement forpulling posts, small stumps and the like.

I claim:

In a hoisting device, the combination of a hollow head having checkswith recesses therein, the recesses having lower edges inclined, alifting bar slidable through the head between said recesses, a dogcomprising a loop extending around said bar and having limited movementin said recesses and adapted to drop against said edges to tilt the loopand grip the bar therein. a lever, and means actuated thereby to liftthe bar.

In testimony whereof I ailix my signature, in presence of two witnesses.

MARTIN KIMBLE.

Witnesses D. BRACKEN, JOHN F. KELLEY.

